· M2/M42 HSS bi metal edge welded to alloy steel back for heavy duty cutting,· 4/6TPI variable teeth, 4/6sharp aggressive teeth, 6 TPIC consant teeth,· Cutting safely and efficiently, the best way to cut large holes, clearing the chips in touch materials,· Cutting depth to 1-3/8"(35mm), 1-1/2"(38mm), 1-3/4"(44mm), 1-27/32"(47mm),· Diameters from 9/16"(14mm) to 9-27/32"(250mm),· Can be used in portable electric or pneumatic Tools, vertical drill machines, lathe, boring /milling, machines and other machines Tools,· Cuts through stainless steel and other materials pipe, Nail-embedded wood, hard wood floors, plywood and plastics,· All the specifications for arbored hole saws are the same as hole saws, there is an extra charge for the pilaots on the arbored hole saws,